Consider the following transactions for Grote's Shipping Materials: April 6 Grote's Shipping Materials buys $158,300 worth of merchandise inventory on account with credit terms of 3/10, n/30. April 13 Grote's Shipping Materials returns $10,000 of the merchandise to the vendor due to damage during shipment. April 16 Grote's Shipping Materials paid the amount due, less the return and discount. Journalize the purchase transactions assuming Grote's Shipping Materials uses the periodic inventory system.